Concave for stone or ore crushers



(NoModel.) I v I; M. VAN WAGNER.

GONUAV STONE OR URE GRUSHER. NO. 525,398.

Patented Sept. 4, 1894.

UNITED STATES PATENTv OFFICE6 ISAAC M. VAN WAGNER, OF FAIRIW, NEWJERSEY, ASSIGNOR TO THE GATES IRON WORKS, OF CHICAGO, ILLINOIS.

CONCAVE FOR STONE OR ORE CRUSHERS.

` SPECIFICATION formng' part of Letters Patent No. 525,398, datedSeptember 4, 1894.

Application filed January 23, 1894. Serial No. 497.785- (No model.)

Io all witam, it may concern:

Be it known that I, IsAAo M. VAN WAGNER, a citizen of the United States,residing at Fairview, in the county of Hudson and State of New Jersey,have invented certain new and useful Improvements in Concaves for Stoneor Ore Crushers; and I do hereby declare the following to be `afull,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvernents in sectional concaves for gyratingstone crushers and other analogous reducing machines; and its object isto prevent rapid destruction of the concave by reason of the crumblingoff, or breaking down of the sections at the junction of one withanother, and at their upper and lower corners; and the inventionconsists in the employment, in combination with hard metal ring sectionsforming the wearing surfaces of the concave, of relatively softer, yetquite enduring metal strips, at the joints between the sections, saidstrips being of wrought or malleable iron, and forming narrow portionsof the wearing surface, and by becoming battered over the edges of thesections, accordingly as the harder metall of the sections breaks orcrumbles offfserving, in addition to their office as wearing surfaces,for filling any irregularities in the more enduring portions of thebrittle wearing surface, and thereby protecting the edges of thesections which may have become broken away from rapid destruction, andthus increasing the durability of the concave. i

It also consists in applying at the top or bottom edge [or both] of thehard metal sections of the concave, -relatively softer metal strips, forthe samepurpose that the relatively softer metal strips are employedbetween the sections of the concave.

In the accompanying drawings, Figure 1. is a Vertical section of a hardmetal/shell-concave made of ring sections and having my inventionapplied to the same.

broken top view of the bottom ring 'section of the concave, the upperring section not being in place.

A' in the drawings shows the concave formed of two horizontal ringsections B3.

' be relatively softer than the metal Fig. 2. is a O' is anarrowhorizontal, metal protection strip in form of al ring made eltherin one piece, or several segmental pieces adjoining one anotherradially. This ring strip is placed horizontally between the ringsections B3 of the concave. A similar protection ring strip Q3 may beapplied at the bottom of the lower ring section of the concave, and alsoone, as (14, at the top of said concave. When the shell or casing A' isformed, as shown, of horizontal metal ring sections, and not lined withchilled wearing surfaces-the ring sections themselves being of hardmetal or chilled on the inside so as to serve as a wearing surface, theprotection ring shaped strips,

whether in one or several segmental pieces, will be arranged as shown inFig. 1.between the adjoining faces of the sections of the casing, andalso at the top and bottom of the sections, but should the shell of thecasing be provided with a wearing lining, such lining would be formed ofhorizontal ring sections, and the protection ring strips placed betweenthe adjoining horizontal surfaces of the lining, and also at bottom andtop of the same. The concave made of ring sections bolted together asshown in Figs. 1 and 2, minus the protection stri s, is not claimed byme, it being the invention ,of Charles L. Carman.

The horizontal protection rings should be made of wrought iron ormalleable iron, and should possess considerable wearing endurance, asthey constitute a portion of the wearing surface, but, while this is so,they should of which the ring shell sections, or the concave lining, isformed, in order that they may be battered over against the edges of theharder portions of the metal forming the wearing surface, as fast asthis metal, at the j unction edges and corners of the ring sections,crumbles and breaks off, under the great strain and Wearing action towhich it is subjected during the crushing operation, and thus save theconcave at these points from rapid destruction.

A practical and preferable manner of applying the horizontal protectionstrips is as follows: The rings are placed horizontally between thehorizontal ring sections B3 of the concave and a protection ring Caisapplied at the bottom of the lower ring section and a protection ring C4placed at the top of the concave. In order to thus apply the ring I castin the respective junction faces of the ring sections B3 soft iron'angular strps B5 having dovetail fastening edges, said strips beingplaced i'n the mold andthe metalfiowed around the same. By this means aperfect Joint can be formed at b, b, when the ring Sections of theconcave are placed together, and also on the inside of,f. In addition toprovidng the soft iron strips B5, the inner portion of the ring sectionsB3 from w, w' are ground upon an emery wheel and sufficient clearanceallowed at e, e' between the two, ring Sections B3, to allow of theinsertion of the wrought iron rings C', either in one piece or 1nsegments. at the points e, e' the ring Sections B3 can be drawn togetherby the screw bolts O5, and the strips B5 caused to bind against oneanother, and dthus a perfectly iron to iron joint secure oncaves notprovided with protection strips of wrought or malleable iron, or asheretofore constructed, Soon Wear away at the Joints, and upper andlower corners, and present sharp exposed corners to the battering actionof the rock, and these corners being very hard crumble off rapidly, soonmaking hollows or valleys at the junctions of the sections,therebylessening the natural life of the concave. But by the use of thewrought or malleable iron strips between the sections this rapid wearand destruction are avoided, from the fact, that the protection stripsare constantly being battered over, and made to fill the crevices thusformed, and also to serve as protectors of the corners of the edges andadjoining Sections. The protection stri ps are, preferably from aquarter to half an inch in thickness, according to the requirements ofthe concave. From the drawings it will be ii By means of the clearance;

ring Sections bolted together, the said strips a being applied where theSections adjoin, and forming portions of the wearing surface, and Whileserving this purpose also serving, by being battered over the edges orcorners of the Sections, for protecting the sections from rapiddestruction, substantially as described.

2. In a concave for gyratory stone crushers, the combination ofintermediate, and top and bottom wrought or malleableiron metal stri ps,with aconcave formed of hard metal ring sections bolted together,substantially as and for the purpose described.

i 3. In concaves for gyratory stone crushers, the combinationwith hardmetal wearing surfaces of a sectional concave, of relatively softermetalstrips applied between the adj oinin g Sections and at the bottom of thelower section, so as to become battered down about the edges of thesaidsections, and thus protect them, substantially as described. I

In vconcaves for gyratory stone crushers, the combination with hardmetal wearn g surfaces of a sectional concave, of relatively softermetal strips applied between the adjoining Sections and at the top ofthe upper section, so as to become battered down about the edges of thesaid Sections, and thus protect them, substantially as described.

In testimony whereof I herennto affix my signature in presence of twowitnesses.

ISAAC M. VAN VAGNER. Witnesses:

J. W. M. BoTToM, C. A. BURNS.

